Which of the following are possible functions of glycoproteins in the plasma membrane?

• A. Energy production
• B. Cell recognition and signaling
• C. Protein synthesis
• D. DNA replication

Answer: (B)

Verified step by step guidance

1. Understand the structure of glycoproteins: Glycoproteins are molecules that consist of a protein and a carbohydrate (sugar) chain. They are embedded in the plasma membrane of cells.
2. Identify the role of glycoproteins in the plasma membrane: Glycoproteins play a crucial role in cell-cell interactions, serving as recognition sites for other cells and molecules.
3. Explore the function of cell recognition: Glycoproteins are involved in the immune response by helping the body recognize its own cells versus foreign cells, which is essential for immune function.
4. Examine the role in cell signaling: Glycoproteins can act as receptors for signaling molecules, allowing cells to communicate with each other and respond to changes in their environment.
5. Differentiate from unrelated functions: Energy production, protein synthesis, and DNA replication are not functions of glycoproteins in the plasma membrane. These processes occur in different cellular contexts and involve other cellular components.